Update dependency finalhandler to v1.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
finalhandler	1.2.0 -> 1.2.1

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Release Notes

pillarjs/finalhandler (finalhandler)

### [`v1.2.1`](https://redirect.github.com/pillarjs/finalhandler/blob/HEAD/HISTORY.md#v121--2024-09-02) [Compare Source](https://redirect.github.com/pillarjs/finalhandler/compare/v1.2.0...v1.2.1) \================== - Gracefully handle when handling an error and socket is null

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